Feed additive for cattle comprising n-acetyl-l-tryptophan as active ingredient

Abstract

Provided are a feed additive composition for cattle including N-acetyl-L-tryptophan (NALT) as an active ingredient, and more particularly, a feed additive composition including N-acetyl-L-tryptophan as an active ingredient for reducing temperature stress of cattle, increasing average daily gain of cattle, and increasing feed intake of cattle; a feed including the feed additive composition for cattle; and methods of reducing temperature stress of cattle, increasing average daily gain of cattle, and increasing feed intake of cattle, the methods including feeding the cattle with the feed additive composition or feed for cattle including N-acetyl-L-tryptophan as an active ingredient.

The invention claimed is: 
     
       1. A method of reducing temperature stress of cattle, the method comprising:
 feeding the cattle with a feed additive composition or a feed for cattle comprising N-acetyl-L-tryptophan as an active ingredient, and 
 breeding the cattle under a temperature stress condition, thereby increasing average daily gain and feed intake of the cattle compared to a control cattle not treated with N-acetyl-L-tryptophan. 
 
     
     
       2. The method of  claim 1 , wherein the temperature stress is cold stress or heat stress. 
     
     
       3. The method of  claim 2 , wherein the cold stress is stress caused at a temperature of 10° C. or lower. 
     
     
       4. The method of  claim 2 , wherein the heat stress is stress caused at a temperature of 15° C. or higher. 
     
     
       5. The method of  claim 1 , wherein the N-acetyl-L-tryptophan is comprised in an amount of 0.01% (w/w) to 3.0% (w/w) based on a total dry weight of a feed.